14
ABB Power Distribution
6
Commissioning/Operation
6.1
Note on safety at work
• The switchgear may only be operated by
specially trained personnel who are familiar with
the characteristics of the particular device.
• Observe the relevant instructions in section 1.2.
6.2
Preparatory activities
(Prior to application of primary voltage)
• Check the circuit-breaker for damage and
restore to the proper conditions where
necessary.
• Remove any contamination (particularly on the
insulating materials) which has occurred during
transit, storage or installation.
• Check the primary and secondary connections
and the protectiv conductor terminal.
• Check the charging motor on circuit-breakers
with motor-operated mechnisms by applying
auxiliary voltage. The stored energy spring is
charged.
• On breakers with manual charging mechanisms,
charge the stored energy spring by hand (see
Section 6.3.1).
• Perform a trial opening or closing operation of
the circuit-breaker using push-button 54.2 or
54.3 (taking into account any required auxiliary
voltage and any relevant interlocks). Observe
switch position indicator 55.4 and charging
condition indicator 55.8.
• Remove transport plugs 57.5 from the poles.
• Check that pole tube caps 57.4 are properly
fitted.
• Ensure that the Instruction Manual is available to
the operators at all times.
6.3
Operation of the circuit-breaker
(Figures 3/3 and 6/1)
6.3.1
Charging the spring energy storage mechanism
Circuit-breakers with charging motors:
• Charging takes place automatically.
• If the charging motor breaks down, the charging
process can be carried out or completed
manually.
Circuit-breakers with manual charging mechanisms:
• Insert charging lever 128 into locating socket
55.6 and pump up and down for approx. 25
strokes until the charged condition is displayed.
• When the charged condition is reached, the
charging mechanism automatically disengages,
and further strokes of the charging lever have no
effect.
5
Installation
Careful and professional installation of the
switchgear is one of the fundamental conditions of
trouble-free circuit-breaker operation.
• Remove handling unit TE and lifting lugs T if
fitted (Figure 2/2).
• Install the breaker housing in the panel without
tension or distorsion. The brackets of handling
unit TE can also be used to fasten the breaker to
the switchroom floor.
• Connect the main terminals without any perma-
nent tension or pressure forces, exerted for
example by the conductor bars.
• When connecting the conductor bars, the bolts
must be inserted to the depth shown on the
dimensional drawing.
• Take account of any tested terminal zone.
• Use DIN bolts of tensile class 8.8, fastening
conductor bars together with dished washers.
• Make a short-circuit proof connection between
the PE conductor and the main earthing bar in
the switchgear, using contact washers.
• Remove any dirt. See also section 7.3.1.
Recommended
rated tightening torque
1) 2)
Nm
Lubricant
3)
Thread size
without
Oil
or grease
M 6
10.5
4.5
M 8
26
10
M 10
50
20
M 12
86
40
M 16
200
80
1)
Rated tightening torques for fasteners without lubrication are
based on the thread friction coefficient 0.14 (the actual
values of which are subject to unavoidable, in some cases
not insignificant, spread)
2)
Rated tightening torques for fastener with lubrication in
accordance with DIN 43 673.
3)
Thread and contact face of head lubricated
Take account of any tightening torques which deviate from the
general table (e.g. for contact systems or device terminals) as
stated in the detailed technical documentation.
It is recommended that the threads or head contact surfaces of
the bolts be lightly oiled or greased, so as to achieve a precisely
defined rated tightening torque
